Loctite 3609 Technical Data Sheet

PRODUCT DESCRIPTION
3609™ provides the following product characteristics:
Technology Epoxy
Chemical Type Epoxy
Appearance (uncured) Dark, red viscous gel
Components One component - requires no mixing
Cure Heat cure
Application Surface mount adhesive
Key Substrates SMD components to PCB
Other Application Areas Small parts bonding
Dispense Method Syringe
Dispense Speed Medium 15,000 -25,000 dots/h
Wet Strength High
3609™ is designed for the bonding of surface mounted devices
to printed circuit boards prior to wave soldering. Particularly
suited for applications where medium to high dispense speeds,
high dot profile, high wet strength and good electrical
characteristics are required.
successfully in lead free processes with water and alcohol
based fluxes under conditions outlined in the Environmental
Resistance section.
TYPICAL PROPERTIES OF UNCURED MATERIAL
Specific Gravity @ 25 °C
Particle Size, µm
Flash Point - See MSDS
Yield Point, 25 °C, Pa
Cone & Plate Rheometer:
Haake PK 100, M10/PK 1 2° Cone
Casson Viscosity @ 25 °C, Pa∙s
Cone & Plate Rheometer:
Haake PK 100, M10/PK 1 2° Cone
VISCOSITY VS. TEMPERATURE
The following graph shows a typical temperature-viscosity
curve as measured using a Haake rotoviscometer PK100,
M10/PK1 2° Cone system at a shear rate of 2 s
representative of the shear rate in the dispense nozzle.
Increased cabin or nozzle temperature in the 30°C to 35°C
range may aid dispense performance at higher dispense
speeds.
400
300
200
100
0
20 25
LMS
3609™ has been used
1.2
<150
250 to 700 LMS
0.16 to 2.0
which is
-1
30 35
TYPICAL CURING PERFORMANCE
Recommended conditions for curing are exposure to heat
above 100 °C (typically 90-120 seconds @ 150 °C). Rate of
cure and final strength will depend on the residence time at the
cure temperature.
Cure Speed vs. Time, Temperature
The following graph shows the rate of torque strength
developed with time at different temperatures. These times are
defined from the moment the adhesive reaches cure
temperature. In practice, total oven time may be longer to allow
for heat up period. Strength is measured on 1206 capacitors @
22 °C, tested according to IPC SM817, TM-650 Method 2.4.42.
100
150°C
125°C
75
50
25
0
0 1 2 3
TYPICAL PROPERTIES OF CURED MATERIAL
Cured for 30 minutes @ 150 °C
Physical Properties:
Coefficient of Thermal Expansion,
ISO 11359-2, K
-1
Coefficient of Thermal Conductivity, ISO 8302,
W/(m·K)
Glass Transition Temperature, ASTM D 4065, °C
Specific Heat, kJ/(kg·K)
Density, BS 5350-B1 @ 25 °C, g/cm³
Electrical Properties:
Surface Resistivity, IEC 60093, Ω
Volume Resistivity, IEC 60093, Ω·cm
Surface Insulation Resistance, Ω:
SN 59651:
Initial
Aged for 4 days @ 40 °C, 93 % RH
Aged for 21 days @ 40 °C, 93 % RH
Electrolytic Corrosion, DIN 53489
Dielectric Constant / Dissipation Factor, IEC 60250:
1-kHz
10-kHz
1,000-kHz
10,000-kHz
Technical Data Sheet
3609™
March-2009
100°C
4 5 6 7 8 9
145×10
0.4
73
0.3
1.4
2×10
15
2×10
15
0.1×10
10×10
1×10 9
AN-1.2
3.7 / 0.009
3.3 / 0.03
3.2 / 0.03
3.1 / 0.03
10
-6
9
9